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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 21 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Off-Vehicle Repair Instructions >> Valve Body and Wiring Harness Removal

Valve Body and Wiring Harness Removal

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Snapping Wiring Harness On Valve Body Bolts
    GM1552913Courtesy of GENERAL MOTORS CORP.
  1. Remove all electrical connectors (1-6) from the electrical components.

    For transmissions with input speed sensors, disconnect the electrical connector (7).

    2. Fig 2: View Of TCC/PWM Solenoid & Clip
    GM405022Courtesy of GENERAL MOTORS CORP.
  2. Remove the torque converter clutch pulse width modulation (TCC/PWM) retainer clip (395).
  3. Remove the TCC/PWM solenoid (396).
    4. Fig 3: View Of TCC Solenoid Bolts
    GM1552915Courtesy of GENERAL MOTORS CORP.
  4. Remove the TCC solenoid bolts (68).
    5. Fig 4: TCC Solenoid Wiring Harness
    GM1552916Courtesy of GENERAL MOTORS CORP.
  5. Remove the TCC solenoid and wiring harness (66). Turn the wiring harness over so that it hangs over the side of the transmission.
    6. Fig 5: TFP Manual Valve Position Switch Retaining Bolts
    GM829171Courtesy of GENERAL MOTORS CORP.
  6. Remove the transmission fluid pressure (TFP) manual valve position switch assembly bolts (62, 70).
  7. Remove the TFP manual valve position switch (69).
    8. Fig 6: View Of Manual Detent Spring Assembly
    GM13263Courtesy of GENERAL MOTORS CORP.
  8. Remove the manual detent spring bolt (64).
  9. Remove the manual detent spring assembly (63).
    10. Fig 7: View Of Valve Body Bolts
    GM1462820Courtesy of GENERAL MOTORS CORP.
  10. Remove all valve body bolts (62).
    11. Fig 8: Disconnecting Manual Valve Link
    GM5449Courtesy of GENERAL MOTORS CORP.
  11. Lift the valve body carefully so that the checkballs remain on the spacer plate in the correct location. While lifting the valve body, disconnect the manual valve link (89) from the manual valve (340).
    12. Fig 9: Identifying Valve Body Checkballs
    GM13132Courtesy of GENERAL MOTORS CORP.
    NOTE: Do not use a magnet in order to remove the control valve body ball check valves. This may magnetize the control valve body ball check valves, causing metal particles to stick to them.
    IMPORTANT: Some models do not use a #5 ball check valve.
  12. Remove the 7 valve body ball check valves (2-6, 8, and 12).
    13. Fig 10: View Of Body Ball Check Valves & Cover Bolts
    GM1755940Courtesy of GENERAL MOTORS CORP.
  13. Remove the accumulator cover bolts (58, 59 or 117, 118).
  14. Remove the 1-2 accumulator cover and pin assembly (57) or 1-2 accumulator cover assembly (116), and gasket (114).
    15. IMPORTANT: Some models do not use an outer 1-2 accumulator spring (54).
  15. Disassemble the 1-2 accumulator assembly (54, 56, 57, 104).
    16. Fig 11: View Of Spacer Plate Support Plate & Bolts
    GM1283236Courtesy of GENERAL MOTORS CORP.
  16. Remove the spacer plate support bolts (77).
  17. Remove the spacer plate support (53 or 113).
    18. Fig 12: Identifying Valve Body Gasket
    GM1220932Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Some models use a bonded spacer plate (48). Do not reuse the bonded spacer plate. Replace with a NEW bonded spacer plate.
  18. Remove the valve body gasket (52), the valve body spacer plate (48) and the case gasket (47).

    Discard gaskets. Do not reuse.

    19. Fig 13: View Of 3-4 Accumulator Piston & Seal Assembly
    GM829176Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Some models do not use a 3-4 accumulator spring (46).
  19. Remove the 3-4 accumulator spring (46) and the 3-4 accumulator piston (44).
    20. Fig 14: Locating #1 Checkball
    GM5455Courtesy of GENERAL MOTORS CORP.
    NOTE: Do not use a magnet in order to remove the control valve body ball check valves. This may magnetize the control valve body ball check valves, causing metal particles to stick to them.
  20. Remove the #1 case ball check valve.
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